(67/161) 2874762 - Sidekick: provide sorting support

It would be nice, if Sidekick would allow to sort the list, e.g. by name of nodes.

Using the CTagsSidekick plugin ("ctags" in the Sidekick dropdown), you can sort the
entries, but when using PHPParser, the nodes are not sorted.

I think Sidekick should provide an interface for this, and Sidekick plugins might
hook into this. But, when sidekick plugins do not provide specific sorting capabilities,
Sidekick should provide a "By name" sorting at least.